Carbureter.



D. M. TILDEN.

GABBURETEE. APfLIOATION FILED rm. 15, 1910.

978,076. I Patented Dec. 6, 1910.

1N VEN T OR,

By I,

A TTORNEY.

W1 TNESSES:

DAVID M. TILDEN,

OF SPRINGFIELD, MASSACHUSETTS.

CARBURETER Specification of Letters Patent. Application fiied'reiiruar 15, 1910. Serial No.

Patented Dec. 6, 1910. 544,044

To all whom it may concern:

Be it known that I, DAVID M. TILDEN, a

Swedish subject, and resident of Springfield, in the county of Hampden andState of Massachusetts, have invented certain new and useful Improvements 1n Carburetors, of

which the following is a full, clear, and ex-' act description.

This invention relates to carbureters, and more especially to that class thereof which are employed in connection with internal- 5 combustion engines and iuwhich a liquid fuel is gaslfied or vaporized by a current of air which thus becomes charged with vapor through my improved carbureter.

2, 2 of Flg. 1.

closed by a valve v serves as a battle-plate which is seated to and is subsequently drawn as explosive charges into the engine cylinders.

My invention has for its object the improved construction of a device of this character in which all danger of back-tiring into the liquid fuel shall be reduced to a minimum, and which, furthermore, shall be of very simple and efficient construction.

The invention has been illustrated in the accompanying drawings in which- Figure 1 is a central. vertical section Fig. 2 is a horizontal section on line Fig. 3 is a similar section on line 3, 3 of Fig. 1, andFig. 4 is a similar section on line 4, 4 of Fig. 1.

Briefly stated 1i is admitted near t carburetor by a uid fuel such as gasolene 1c central portion of the pipe which is normally which at the same time close said pipe by a spring which may be accuratel gaged to oil'er a certain resistance, while at the same time the amount of opening of said valve may be accurately controlled, and in the )resent instance an airchambcr is disposed around the fuel inlet )ipe, the top of which is closed by a plate having a number of openings which in turn may be wholly or partially closed by a regulatin plate forming the bottom of the mixliamber, and a similar construction prevails for permitting the passage of the mixture into the outlet pipe. The entire organization being such that the air rushing into the mixing-chamber will come in direct contact with the underside of the valve for the purpose of raising the same, so that-by virtue of the air-regulation in connection with the adjustment of the spring pressure results will be obtained.

'inent with the casing 12 and may be Referring to the drawings, the numeral 10 denotes the carbureter-casing comprising a pair of chambers 11, 12 which are separated from each other by a partition 13 having a series of o enings 14 through which the gases establis led in the receiving-chamber disposed below the chamber 11 will pass as controlled by a valve-plate 15 which has openings 16 adapted to register with the openings 14 above mentioned, and which constitutes the upper closing of the receiving-chamber proper.

The rccei ring-chamber is herein denoted by the numeral 20 and consists substantially of a hollow cylindrical box closed at its upper end by the plate 15 above mentioned, and having its bottom closed by a plate 21 provided with openings 22 to permit the admission of air thereinto as controlled by the position of these "(ipenings relative to simi lar openings 23 provided in a plate 24 which is secured to, or forms a part of, the bottom cover 25 for the lower carburetersection 12. In order to permit the proper assemblage of the receivin -chamber 20 into the lower carburetebchamber 12, the bottom of the latter is formed open, so that the receiving-chamber may be inserted thereinto, and the bottom of the section 12 is then closed by the bottom-cap 25 above mentioned, which is in screw threaded engagethus adj ustcd vertically to secure proper positioning of the mixing-chamber 20 within the casing vertically, while a check-nut 26 may be employed to firmly hold the cap 25 in its adjusted position. i V

lret'ornbly made integral with the cap 25, is a tubular nipple 27 which also projects through the bottom-plate 21. of the receiving-chamber. and which at its upper end is normally closed by a valve indicated in a general way by V, this valve cxtendiln for considerable distance beyond the vnipp e 27 and of such size relative to the openings 22 and 23 that when a current of air passes upward through said openings, said current of air will come in direct contact with the underside of the valve V and raise the same. In connection with this force it. may be stated that according to the amount of tree opening of the trolled by the position) oi" the receiving chapiber relative to thegcap 25, a certain throttle thereof may take place, it being understood that the less free passage such apertures 22 and 23 as conopenings afford to the inrushing air, the less-effective pressure will be exerted upon the valve V to raise the same and vice versa.

The valveV is provided with a series of small concentrically disposed perforations 28, so that all the ini'ushing air will not be obliged to pass around the outside of the I has a cylindrical flange 31 upon which is spring valve and the lower end of said sleeve mounted for rotative adjustment, an airdistributing chamber 32 having an inlet con duit 33 which is open to the atmosphere so that when suction is applied as for instance by the piston movement of the gas engine,. connected with the outlet conduit 3a of the device, air will be drawn from the airchamb'er 32 through the openings 22, 23, thus raising the valve V and permitting gasolene to enter the receiving-chamber 20 where it naturally will be mixed with the air into a gaseous compound which finds its exit through the openings 16 and 14 into the outlet conduit 34:.

Means are provided for resisting the opening of the valve V according to the grade of liquid fuel employed, it being well known that the higher grade the liquid fuel is, the less amount of such fuel is required to produce the proper explosive mixture. These means consist in the present instance of a spring 35 surrounding the valve stem 36 which is guided for vertical movement in a sleeve 37 extending through and screw threaded in the carbureter casing as clearly shown in Fig. 1, so that said sleeve 37 may be raised or lowered relatively to the casing as required to produce proper tension of the 35 which is interposed between the When properly adjusted, said sleeve 37 may be locked in place by a check-nut 38, as shown. Means are also provided whereby the amount of opening movement of the valve V may be controlled, these means consisting of an abutment-rod 39 in screw threaded engagement with the interior of the sleeve 37 and adapted to be held in adjusted position by a check-nut 40 applied to the upper end thereof.

From the foregoing, it follows that the present device is adapted to control, first: the amount of air entering into, and leaving, the mixing-chamber 20 by virtue of its being mounted for rotation within the easing 12 and as may be actuated by an arm ll secured to themixing-chamber 20 and passing through a slot 42 provided therefor in 3 the carbureter-casing 12. Second: to vary l the admission of fuel liquid into the mixing grade'of such liquid; and third: to control the amount of opening of the valve irrespective of the spring pressure exerted thereon as above mentioned. the present device is so constructed that the communication with the atmosphere irrespective of the fact whether the openings 22 and 23 are in register or not, so that in case of the explosion of the mixture in the chamis for instance shown in Figs, 1 and 2 in ries of perforations 45, while the mixingchamber has similar perforations L6 both of which are in constant communication with each other either through direct passage from one end to the other or by Virtue of a space left between the bottom-plate 21 of the mixing-chamber 20 and the upper face of the plate 24 of the cap It may be noted in the present instance the mixingchamber has both its upper and lower plates provided with the openings 16 and 22, respectively, so that the rotation of the mixing-chamber will result in varying the size of the free openings or passages of the same, simultaneously, these openings, however, not being sufficiently large to permit the inser tion of the valve-plate V so that the cylindrical wall of the mixing-chamber 20 is provided with an opening 50 through which said valve may be placed in position and as sembled with its coiiperetive parts.

Manychanges may be made in the con struction and organization of the device without departing from the spirit of the invention.

I claim 1. A carbureter compr1s1ng a casing having openings in the top and two sets of openings in the bottom thereof, a drum forming a receiving chamber and rotatively mounted within said casing, there being openings formed in the top and the bottom of said drum, and there being additional openings formed in the bottom of the drum adapted to register with the openings of the casing, a fuel supply pipe passing through the-casing and projecting into the interior of the drum, a spring controlled fuel valve for controlling the fuel. supply pipe, said valve carrying a horizontally disposed disk of considerably greater diameter than the fuel pply p r openings formed through said disk as and for, the purposes set forth.

2. The combination with a casing comprising an upper chamber separated from each other by an apertured partition, a carbureting chamber comprising a hollow cylindrical box having chamber in accordance with the quality or Furthermore,

interior mixing-chamber will alwaysbe inwhich the cap is illustrated as having a setherebeing a plurality of.

chamber and a lower ber.20, a vent will be provided therefor as x tion with the bottomplate of the carbureting-chamber a fuel-su ply passin thr ugh said air-charhber into the carburetl ng-ciiambe'r anda valve for the fuel-supply and extending over the apertures in the bottom- 10 plate of the carbureting-chamber.

' Signed by me at S ringfield, Mass in presence of-two SllbSCIl ing witnesses.

D. M. TILDEN.

vWitnesses:

WM. S. BELLows, G. R. DmscoLL. 

